Malicious PDF — malware analysis report

Static analysis result for SHA-256 65ff4070207ec437…

MALICIOUS

PDF

80.0 KB Created: 2021-09-22 13:13:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 05f891b5bc7d751b901807ff044712d8 SHA-1: 41c82482d38e486976dfc176383f98bae8e6c0de SHA-256: 65ff4070207ec4376cb77cb667ac87a337ab936bb0ac46fde74f7d524a91755f
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document was flagged by a machine learning classifier and ClamAV as malicious, exhibiting characteristics of phishing and fake CAPTCHA lures. The presence of numerous external URIs, including one pointing to 'garglob.ru', suggests it is designed to redirect users to malicious sites or download further payloads. The document's structure and heuristic firings indicate it's likely part of a phishing campaign aiming to exploit user interaction.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://garglob.ru/uplcv?utm_term=smart+one+iptv+apk PDF link annotation
    • https://poganyvolgyi.hu/userfiles/file/90912995269.pdfIn PDF document text
    • http://www.painters-restaurant.com/userfiles/file/zejuranopebaropuv.pdfIn PDF document text
    • https://simorgh.it/uploads/file/21904125603.pdfIn PDF document text
    • http://eng.sut.ac.th/tce/2016/administrator/ckfinder/userfiles/files/89512736761.pdfIn PDF document text
    • https://haps.company/wp-content/plugins/super-forms/uploads/php/files/3edb240309e641ef9b8334c3f3d4d690/42021882920.pdfIn PDF document text
    • https://kultmotor.hu/images/files/5011588952.pdfIn PDF document text
    • http://viviapalermo.com/userfiles/files/82956988404.pdfIn PDF document text
    • http://veszpremlizards.hu/_user/file/32597326268.pdfIn PDF document text
    • http://asbu.net/uploads/FCK_files/file/49696905580.pdfIn PDF document text
    • http://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16148e70665443---tudijokanifuxuxolilitozuw.pdfIn PDF document text
    • http://birzebbugastpetersfc.com/files/file/kukugojaburagugowotepeg.pdfIn PDF document text
    • https://phuquiland.com/upload/files/23932370810.pdfIn PDF document text
    • http://cnkls.com/userfiles/file/1631905850.pdfIn PDF document text
    • http://softtox.com/new/userfiles/file/64721741978.pdfIn PDF document text
    • http://etcpremium.com/userfiles/files/22688020960.pdfIn PDF document text
    • http://wajl.net/img/file/202191851554.pdfIn PDF document text
    • https://inprovitcentroamerica.com/ckfinder/userfiles/files/57169066102.pdfIn PDF document text
    • http://nikolalepojevic5.com/multimedia/file/18780900364.pdfIn PDF document text
    • http://kirakuramen.com/uploads/files/dusilisivimalogeku.pdfIn PDF document text
    • https://lensmam.com/userfiles/file/95022288426.pdfIn PDF document text
    • https://dodatnagarancija.com/userfiles/file/37163934108.pdfIn PDF document text
    • http://abhinavabhishad.org/userfiles/file/bekatifu.pdfIn PDF document text
    • http://cesnek-vysocina.cz/UserFiles/File/95021297249.pdfIn PDF document text
    • http://virtuozi.ru/sites/all/sites/virtuozi.ru/files/93142880966.pdfIn PDF document text
    • http://www.bsa.by/ckfinder/userfiles/files/zomuvolibuvonu.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d3ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3EF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ec06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC06 10432 bytes
SHA-256: 5d2f66e0e2882a66439760e58bfb3e48eb6fff92e6255f13b51ca51f84f69d8d
font_02_sfnt_off000103af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103AF 18040 bytes
SHA-256: ae88ab04de0c7a320622caaa553cd9f8a5a984ff9e4f3742870d65d982c26f3e